|
When I create a application with a empty form ,I use followed function to handle KeyDown event :
private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
switch (e.KeyCode)
{
case (Keys.Left) :
MessageBox.Show("You have pressed Arrow-Key Left");
break;
case (Keys.Right) :
MessageBox.Show("You have pressed Arrow-Key Right");
break;
}
}
The application runs well but when I add a new button , this function can't handle the KeyDown event ,this code no longer runs properly.Why ?
I use Visual Studio .Net 2003.
Sorry if my English is not good.
This is all code :
-First is Empty form(Run well) :
namespace WindowsApplication2
{
public class Form1 : System.Windows.Forms.Form
{
private System.ComponentModel.Container components = null;
public Form1()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Name = "Form1";
this.Text = "Form1";
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
}
#endregion
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
switch (e.KeyCode)
{
case (Keys.Left) :
MessageBox.Show("You have pressed Arrow-Key Left");
break;
case (Keys.Right) :
MessageBox.Show("You have pressed Arrow-Key Right");
break;
}
}
}
}
- After add a button :
namespace WindowsApplication2
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.ComponentModel.Container components = null;
public Form1()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 80);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
this.ResumeLayout(false);
}
#endregion
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
switch (e.KeyCode)
{
case (Keys.Left) :
MessageBox.Show("You have pressed Arrow-Key Left");
break;
case (Keys.Right) :
MessageBox.Show("You have pressed Arrow-Key Right");
break;
}
}
}
}
le van giang
|
|
|
|
|
You need to set a property on the button so that the keyboard event it recieves when it has the focus is passed to it's parent.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
because when you add button control it has a focus when the form run
so the message goes to button not to the form
|
|
|
|
|
But when I set focus to Form :
Form1.Focus() ;
It still not runs.
le van giang
|
|
|
|
|
The property to set is on the Form, it's called KeyPreview. Set it to true.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Sorry,It can't run.You can try it.
|
|
|
|
|
Fair enough. I'm sure that's what I did to solve it in my apps though. Is there a similar property on the buttons ?
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Hello Again,
I am back with another issue. Hope I will get help this time too...
I have a windows form where I display all my query results in a Data Grid. On double clicking on any record, the selected record is displayed in a new window(new form). I am able to achieve till this.
My problem starts from here. If I double click on the already selected record, the form should not be opened again as it is already open. But if I select different record from query results grid, another form should be opened.
What I mean to say is, I can have any number of forms open but only one instance should exist for any selected record.
Please guide me...
Thanks
|
|
|
|
|
A hashtable of the primary key value going to the modeless dialog you're obviously creating. If the key exists, the value is not null and the form the value points to is visible, don't display anything.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Thanks Christian. I am checking for the Key exists or not and restricting a new form from opening.
Thanks once again for all the help.
|
|
|
|
|
do not forget to remove the value from hashtable
when form closed
|
|
|
|
|
Sure I will do that. Thank You.
|
|
|
|
|
Hi,
Everytime I add the PayPalSvc web reference (ie:
http://www.paypal.com/wsdl/PayPalSvc.wsdl) into either a .Net console or forms app and try to compile I get this error:
The type or namespace 'PayPalAPIInterfaceService' could not be found - are you missing a using directive or an assembly reference?).
Can anyone tell me what I need to do to get this to work? THe web service adds in fine and I have a "using PayPalAPI.PayPalSvc;" in my C# code - what have I forgotten or done wrong here?
(And yes, I have also posted at the PayPal dev forums but almost no-one ever answers so was hoping some web services or C# guru could help me out here.)
TIA...
Mike
|
|
|
|
|
nzmike wrote:
The type or namespace 'PayPalAPIInterfaceService' could not be found - are you missing a using directive or an assembly reference?).
If you have the using directive, you must be missing the assembly reference. Have you linked your project to their assembly ? If it's a webservice, perhaps you need to import their service into the project ( get a web reference to it ) ?
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Thanks Christian but could you elaborate a little more? I've already added the web reference to the project (Project -> Add Web Reference) and it seems fine.... do I have do something else as well?
Mike
|
|
|
|
|
Does the class that was generated have the namespace you're trying to use ?
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
You mean the reference.cs that's created when I add the web servce reference or the name of the entire class I'm trying to create?
If it's the former then I think so... my solution and project are both called PayPalAPI and in it I have created a new class called APIWrapper.cs which, when compiled, is to be used to call PayPal services from other .Net apps. The namespace of this class is PayPalAPI. The namespace of the reference.cs that was generated after adding the WS is PayPalAPI.PayPalSvc. (I had to rename the WS from com.paypal.www to 'PayPalSvc' when I added it.)
Does that help or have I confused you?
Thanks for bearing with me - I've used web services before so can't understand what's happening here!
Mike
|
|
|
|
|
'PayPalAPIInterfaceService' is what you can't find - where did it come from, and does it appear in your code ? Could it be a reference to something that was renamed when you renamed the WS ?
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
'"PayPalAPIInterfaceService" description' is what the WSDL screen shows when you type the reference to the PayPal web services (http://www.paypal.com/wsdl/PayPalSvc.wsdl) and hit "go". It says "1 service found - PayPalSvc" and the name is com.paypal.www. I rename that to PayPalSvc and click "Add Reference". The code below in my wrapper class then tries to access PayPalAPIInterfaceService. (I've marked the error lines with "//GETS ERROR HERE".... that's where the compiler says it can't find PayPalAPIInterfaceService.)
If you want I could zip up the project and email it to you or make it downlaodable from my server... it might be easier to see waht's going on - let me know if that would help.
Thanks again,
Mike
------------ APIWrapper.cs --------------------
using System;
using System.Net;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using PayPalAPI.PayPalSvc;
using PayPalAPI;
using System.Data;
using System.Collections;
using System.Security;
namespace PayPalAPI
{
///
/// Summary description for APIWrapper.
///
public class APIWrapper
{
string _APIUserName="";
string _APIPassword="";
string _CertLocation="";
string _APIUrl="";
public string APIUserName
{
get{return _APIUserName;}
}
public string APIPassword
{
get{return _APIPassword;}
}
public string CertLocation
{
get{return _CertLocation;}
}
public string APIUrl
{
get{return _APIUrl;}
}
PayPalAPIInterfaceService service; //GETS ERROR HERE
public APIWrapper(String APIUserName, string APIPassword, string CertLocation, string APIUrl)
{
_APIUserName=APIUserName;
_APIPassword=APIPassword;
_CertLocation=CertLocation;
_APIUrl=APIUrl;
// Add the CertificatePolicy so we can post to an untrusted site
ServicePointManager.CertificatePolicy = new MyCertificateValidation( );
service = new PayPalAPIInterfaceService( ); //GETS ERROR HERE
service.Url = _APIUrl;
// Add the X509 Cert to the service for authentication
X509Certificate certificate = X509Certificate.CreateFromCertFile(_CertLocation);
service.ClientCertificates.Add(certificate);
SetHeaderCredentials(service);
}
void SetHeaderCredentials(PayPalAPIInterfaceService service)
{
CustomSecurityHeaderType securityHeader = new CustomSecurityHeaderType( );
UserIdPasswordType userIdPassword = new UserIdPasswordType( );
userIdPassword.Username = _APIUserName;
userIdPassword.Password = _APIPassword;
//userIdPassword.Subject = subject;
securityHeader.Credentials = userIdPassword;
securityHeader.MustUnderstand = true;
service.RequesterCredentials = securityHeader;
}
string GetAmountValue(BasicAmountType amount)
{
string sOut="";
try
{
sOut="$"+amount.Value.ToString( );
amount.currencyID = CurrencyCodeType.USD;
}
catch
{
sOut="--";
}
return sOut;
}
}
class MyCertificateValidation : ICertificatePolicy
{
// Default policy for certificate validation.
public static bool DefaultValidate = false;
public bool CheckValidationResult(ServicePoint sp, X509Certificate cert, WebRequest request, int problem)
{
//implement your custom code here
return true;
}
}
}
------------ APIWrapper.cs --------------------
|
|
|
|
|
Actually, if you could give me the URL to generate the web reference, that may be just as good.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
http://www.paypal.com/wsdl/PayPalSvc.wsdl
I'm not sure what happens if you try and add it without a local certificate from PayPal (to use it's API)... I have the cert for our merchant account installed in the PErsonal and Other People certificate stores.
Mike
|
|
|
|
|
I was able to add the web service, but it did not wrap "paypalsvc" in another namespace, I was able to create and manipulate objects using PayPalSvc.Classname varName = new PayPalSvc.Classname(). I'd search across the project for 'PayPalAPIInterfaceService', and see where it's expecting to find it. It does not appear within the webservice, the problem is elsewhere.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Ok, well thanks for trying.
I'm now starting from scratch with a very simple forms app that uses the service (the code I had for the APIWrapper class was from the "PayPal Hacks" book) so will see what luck I have with that.
I also now have a direct technical support contact at PayPal so hopefully if the problem persists he will look at it.
Many thanks for your help.... it was much appreciated.
Mike
|
|
|
|
|
I am attempting to send a message using CDO in a ASP.NET/C# Application:
I receive the following Error when trying to update the fields:
////////////////////////////////////////////
ERROR
////////////////////////////////////////////
Fields update failed. For further information, examine the Status property of individual field objects.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Runtime.InteropServices.COMException: Fields update failed. For further information, examine the Status property of individual field objects.
////////////////////////////////////////////
The code looks like the following:
////////////////////////////////////////////
//// CLASS VARIABLES
static private String _currStoreName = "My";
static StoreClass _oCurrStore;
const string CDO_MailServer = "mail.dovetailinternet.com";
const string CDO_ContentDisposition = "attachment;filename=smime.p7m";
const int CDO_SmtpPort = 25;
const int CDO_SendUsingType = 2;
private Certificates oCerts;
private Certificate oCert;
private EnvelopedData oEnvData;
////METHODS
private void CDOMail()
{
CDO.Configuration mailerConfig = new CDO.ConfigurationClass();
CDO.IMessage firstMsg = new CDO.MessageClass();
CDO.IMessage secondMsg = new CDO.MessageClass();
mailerConfig.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = CDO_SendUsingType;
mailerConfig.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = CDO_MailServer;
mailerConfig.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = CDO_SmtpPort;
mailerConfig.Fields.Update();
firstMsg.Sender = "from@internet.com";
firstMsg.To = "to@internet.com";
firstMsg.Subject = "First Message Subject";
firstMsg.TextBody = "Message One Body";
secondMsg.DataSource.OpenObject(firstMsg, "IMessage");
CDO.IBodyPart oBodyPart = secondMsg.BodyPart;
oBodyPart.ContentMediaType = "application/pkcs7-mime;smime-type=enveloped-data;name=smime.p7m;";
oBodyPart.ContentTransferEncoding = "base64";
//*** Update That Fails
oBodyPart.Fields["urn:schemas:mailheader:content-disposition"].Value = CDO_ContentDisposition;
oBodyPart.Fields.Update();
//***
secondMsg = EnvelopeMessage(secondMsg);
secondMsg.Configuration = mailerConfig;
secondMsg.Send();
}
//// ENVELOPMESSAGE
private CDO.IMessage EnvelopeMessage(CDO.IMessage msg)
{
CDO.Message oSecMsg = new CDO.MessageClass();
oSecMsg.DataSource.OpenObject(msg, "IMessage");
_oCurrStore = new StoreClass();
_oCurrStore.Open(CAPICOM_STORE_LOCATION.CAPICOM_CURRENT_USER_STORE, _currStoreName,CAPICOM_STORE_OPEN_MODE.CAPICOM_STORE_OPEN_EXISTING_ONLY | CAPICOM_STORE_OPEN_MODE.CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED);
oCerts = (Certificates)_oCurrStore.Certificates;
foreach(Certificate cert in oCerts)
{
oCert = cert;
}
CAPICOM.EnvelopedData oEnvData = new CAPICOM.EnvelopedDataClass();
oEnvData.Recipients.Add(oCert);
ADODB.Stream tmpStream = oSecMsg.BodyPart.GetStream();
string strContent = tmpStream.ReadText(tmpStream.Size);
oEnvData.Content = strContent;
string strData = oEnvData.Encrypt(CAPICOM.CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64);
ADODB.Stream oStream = oSecMsg.BodyPart.GetDecodedContentStream();
oStream.Type = ADODB.StreamTypeEnum.adTypeBinary;
byte[] byteData = Convert.FromBase64String(strData);
oStream.Write(byteData);
oStream.Flush();
oStream.Close();
return oSecMsg;
}
Any help would be greatly appreciated, i've been trying to resolve the issue for hours on end, and know that eliminating this error will likely yield the desired effect.
I have been unable to find any good examples of sending CDO.Mail with .NET except the one here:
http://support.microsoft.com/Default.aspx?kbid=280391
I Followed the Instructions and am now faced with this problem. Please Help me!
|
|
|
|
|
I want to get a date with the "dd/MM/yyyy" format in C#.net, but when I write the code like
date_txt.Text = System.DateTime.Today.Date.ToShortDateString;
In the textbox it shows 2005-08-03, this format. And it can't be written into the access source database.
Does anybody know how to get "dd/MM/yyyy" this kind of date format and write it into access source database???
By the way, if I want to display some record between two dates, any ideas???
Many Thanks
Asura
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
